The UVM2 magnitudes of the new SySt in Table REF  correspond to
flux densities (in units of 10\(^{-15}\)  erg cm\(^{-2}\)  s\(^{-1}\)  Å\(^{-1}\) ) of
0.54, 1.52 and \(<\) 0.05, for GaSS 1-11, 1-12 and 1-31, respectively (from the
countrate-to-flux calibration given in [1]} and
[2]}). Then, considering the distances and
\(E(B-V)\)  colour excesses reported in Table REF , correcting
for the Galactic reddening according to the prescription in section 3.2 of
[3]} and the UV correction coefficients in their
table 5, and assuming for the three objects a flat spectral distribution in
the UV as Mk16 did for SU Lyn, we obtain the unabsorbed UV luminosities
listed in Table REF . In the hypothesis of accretion onto a WD
of mass 1 M\(_\odot \) , as Mk16 has inferred for SU Lyn, in
Table REF  we report also the corresponding accretion rates.
